胶东焦家成矿带超千米深部金矿勘查突破及意义——以纱岭矿区为例
|
摘要
纱岭矿区超千米深部找矿突破是科学预测与勇于探索有机结合的结果。结合地球物理探测、阶梯式成矿模式、趋势外推及矿体空间分布规律等,在纱岭矿区预测并圈定了3处深部找矿靶区,按照"整体部署、分段实施"及"边施工、边研究、边调整"的原则分3个阶段完成了靶区验证和勘查工作。所取得的深部找矿突破有:在纱岭矿区共探获工业矿体77个,新增金金属量389 t;Ⅰ-2号主矿体单矿体资源量超过300 t,赋矿标高为-940~-2 030 m,矿体最大走向长1 680 m,最大倾斜长2 180 m,最大控制垂深为1 039 m,厚度为1.16~125.64 m。纱岭金矿床赋存于焦家断裂下盘,主矿体与其浅部相邻矿区矿体连续延深的垂向距离>2 km,远远超过了浅成低温热液金矿的形成深度,表明胶东型金矿与浅成低温热液型矿床的形成环境明显不同,预测其深部找矿潜力巨大。进一步分析表明,纱岭矿区南侧的前陈—上杨家预测区和深部的招贤预测区仍有较大的找矿潜力。
The breakthrough of deep prospecting of depth more than 1000 m in the Shaling mining area is the organic combination of scientific prediction and brave exploration.According to geophysical,"ladder-type"metallogenic theory,trend extrapolation and spatial distribution of ore body,three deep mineralization targets have been predicted in Shaling mining area.Then target verification and exploration work are completed in three stages following the principle of "overall deployment,phased implementation"and "studying and adjustment should be take in the process of project implementation".There has a great breakthrough in deep exploration:77industrial orebodies increased the amount of gold by 389 t and the single ore resources of No.Ⅰ-2 main ore body is more than 300 t,whose ore bearing elevation is-940~-2 030 m,the maximum length of orebody trend is 1 680 m,the maximum inclination is 2 180 m,the maximum control vertical depth is 1 039 m,and thickness is 1.16~125.64 m.In conclusion,Shaling gold deposit occurs in the footwall of Jiaojia fault,the vertical distance of the continuous extension of the main orebody and its adjacent mining area is more than 2 km,much deeper than mineralization depth of the epithermal gold deposit,indicating the metallogenic environment of Jiaodong type gold deposit and epithermal deposit is obviously different,and the prospecting potential of Jiaodong type gold deposit is huge.Further analysis shows that Qianchen-Shangyangjia prediction area and Zhaoxian prediction area still have a good prospecting potential.
The breakthrough of deep prospecting of depth more than 1000 m in the Shaling mining area is the organic combination of scientific prediction and brave exploration.According to geophysical,"ladder-type"metallogenic theory,trend extrapolation and spatial distribution of ore body,three deep mineralization targets have been predicted in Shaling mining area.Then target verification and exploration work are completed in three stages following the principle of "overall deployment,phased implementation"and "studying and adjustment should be take in the process of project implementation".There has a great breakthrough in deep exploration:77industrial orebodies increased the amount of gold by 389 t and the single ore resources of No.Ⅰ-2 main ore body is more than 300 t,whose ore bearing elevation is-940~-2 030 m,the maximum length of orebody trend is 1 680 m,the maximum inclination is 2 180 m,the maximum control vertical depth is 1 039 m,and thickness is 1.16~125.64 m.In conclusion,Shaling gold deposit occurs in the footwall of Jiaojia fault,the vertical distance of the continuous extension of the main orebody and its adjacent mining area is more than 2 km,much deeper than mineralization depth of the epithermal gold deposit,indicating the metallogenic environment of Jiaodong type gold deposit and epithermal deposit is obviously different,and the prospecting potential of Jiaodong type gold deposit is huge.Further analysis shows that Qianchen-Shangyangjia prediction area and Zhaoxian prediction area still have a good prospecting potential.
引文
[1]Song M C,Deng J,Yi P H,et al.The kiloton class Jiaojia gold deposit in eastern Shandong Province and its genesis[J].Acta Geologica Sinica,2014,88(3):801-824.
[2]Song Mingchun,Cui Shuxue,Zhou Mingling,et al.The deep oversize gold deposit in the Jiaojia field,Shandong Province and its enlightenment for the Jiaojia-type gold deposits[J].Acta Geologica Sinica,2010,84(9):1349-1358.[宋明春,崔书学,周明岭,等.山东省焦家矿区深部超大型金矿床及其对“焦家式”金矿的启示[J].地质学报,2010,84(9):1349-1358.]
[3]Li Shixian,Liu Changchun,An Yuhong,et al.Geology of Jiaodong Gold Deposits[M].Beijing:Geological Publishing House,2007.[李士先,刘长春,安郁宏,等.胶东金矿地质[M].北京:地质出版社,2007.]
[4]Song M C,Wan G P,Cao C G,et al.Geophysical-geological interpretation and deep-seated gold deposit prospecting in Sanshandao-Jiaojia area,Eastern Shandong Province,China[J].Acta Geologica Sinica,2012,86(3):640-652.
[5]Song Mingchun,Yi Pihou,Xu Junxiang,et al.A step metallogenic model for gold deposit in the northwest Shandong Peninsula[J].Science China(Earth Sciences),2012,42(7):992-1000.[宋明春,伊丕厚,徐军祥,等.胶西北金矿阶梯式成矿模式[J].中国科学(地球科学),2012,42(7):992-1000.]
[6]Song Mingchun,Cui Shuxue,Yi Pihou,et al.Prospecting and Metallogenic Model of Deep Large and Super-large Gold Deposits in the Gold Concentration Area,Northwest China[M].Beijing:Geological Publishing House,2010.[宋明春,崔书学,伊丕厚,等.胶西北金矿集中区深部大型-超大型金矿找矿与成矿模式[M].北京:地质出版社,2010.]
[7]Bao Zhongyi,Niu Tao,Gao Shujian,et al.Geological characteristics of orebodies in deep part and its predication of oreforming in Jiaojia gold deposit[J].Shandong Land and Resources,2010(1):59-61.[鲍中义,钮涛,高书剑,等.焦家金矿床深部矿体地质特征及深部成矿预测[J].山东国土资源,2010(1):59-61.]
[8]Yang Liqiang,Deng Jun,Wang Zhongliang,et al.Mesozoic gold metallogenic system of the Jiaodong gold Province,Eastern China[J].Acta Petrologica Sinica,2014,30(9):447-467.[杨立强,邓军,王中亮,等.胶东中生代金成矿系统[J].岩石学报,2014,30(9):447-467.]
[9]Sha Deming,Yuan Lihua.The characteristics,distribution and prospect of epithermal gold deposits[J].Geology and Resources,2003,12(2):115-124.[沙德铭,苑丽华.浅成低温热液型金矿特点、分布和找矿前景[J].地质与资源,2003,12(2):115-124.]
[10]Yang Zhongfang,Zhao Lunshan,Zhou Qiming,et al.Phy sicochemical constrains on mineralization of epithermal gold deposits in Muping-Rushan mineralization zone,eastern Shandong Province,China[J].Acta Mineralogica Sinica,1994,14(3):270-278.[杨忠芳,赵伦山,周奇明,等.胶东牟乳金矿带浅成热液金矿成矿作用的物理化学条件制约[J].矿物学报,1994,14(3):270-278.]
[11]Zhu Rixiang,Fan Hongrui,Li Jianwei,et al.Decratonic gold deposits[J].Science in China(Earth Sciences),2015,45(8):1153-1168.[朱日祥,范宏瑞,李建威,等.克拉通破坏型金矿床[J].中国科学(地球科学),2015,45(8):1153-1168.]
[12]Li L,Santoshb M,Li S R.The Jiaodong type gold deposits:Characteristics,origin and prospecting[J].Ore Geology Reviews,2015,65:589-611.
[13]Song Mingchun.The main achievements and key theory and methods of deep-seated prospecting in the Jiaodong gold concentration area,Shandong Province[J].Geological Bulletin of China,2015,34(9):1758-1771.[宋明春.胶东金矿深部找矿主要成果和关键理论技术进展[J].地质通报,2015,34(9):1758-1771.]
[2]Song Mingchun,Cui Shuxue,Zhou Mingling,et al.The deep oversize gold deposit in the Jiaojia field,Shandong Province and its enlightenment for the Jiaojia-type gold deposits[J].Acta Geologica Sinica,2010,84(9):1349-1358.[宋明春,崔书学,周明岭,等.山东省焦家矿区深部超大型金矿床及其对“焦家式”金矿的启示[J].地质学报,2010,84(9):1349-1358.]
[3]Li Shixian,Liu Changchun,An Yuhong,et al.Geology of Jiaodong Gold Deposits[M].Beijing:Geological Publishing House,2007.[李士先,刘长春,安郁宏,等.胶东金矿地质[M].北京:地质出版社,2007.]
[4]Song M C,Wan G P,Cao C G,et al.Geophysical-geological interpretation and deep-seated gold deposit prospecting in Sanshandao-Jiaojia area,Eastern Shandong Province,China[J].Acta Geologica Sinica,2012,86(3):640-652.
[5]Song Mingchun,Yi Pihou,Xu Junxiang,et al.A step metallogenic model for gold deposit in the northwest Shandong Peninsula[J].Science China(Earth Sciences),2012,42(7):992-1000.[宋明春,伊丕厚,徐军祥,等.胶西北金矿阶梯式成矿模式[J].中国科学(地球科学),2012,42(7):992-1000.]
[6]Song Mingchun,Cui Shuxue,Yi Pihou,et al.Prospecting and Metallogenic Model of Deep Large and Super-large Gold Deposits in the Gold Concentration Area,Northwest China[M].Beijing:Geological Publishing House,2010.[宋明春,崔书学,伊丕厚,等.胶西北金矿集中区深部大型-超大型金矿找矿与成矿模式[M].北京:地质出版社,2010.]
[7]Bao Zhongyi,Niu Tao,Gao Shujian,et al.Geological characteristics of orebodies in deep part and its predication of oreforming in Jiaojia gold deposit[J].Shandong Land and Resources,2010(1):59-61.[鲍中义,钮涛,高书剑,等.焦家金矿床深部矿体地质特征及深部成矿预测[J].山东国土资源,2010(1):59-61.]
[8]Yang Liqiang,Deng Jun,Wang Zhongliang,et al.Mesozoic gold metallogenic system of the Jiaodong gold Province,Eastern China[J].Acta Petrologica Sinica,2014,30(9):447-467.[杨立强,邓军,王中亮,等.胶东中生代金成矿系统[J].岩石学报,2014,30(9):447-467.]
[9]Sha Deming,Yuan Lihua.The characteristics,distribution and prospect of epithermal gold deposits[J].Geology and Resources,2003,12(2):115-124.[沙德铭,苑丽华.浅成低温热液型金矿特点、分布和找矿前景[J].地质与资源,2003,12(2):115-124.]
[10]Yang Zhongfang,Zhao Lunshan,Zhou Qiming,et al.Phy sicochemical constrains on mineralization of epithermal gold deposits in Muping-Rushan mineralization zone,eastern Shandong Province,China[J].Acta Mineralogica Sinica,1994,14(3):270-278.[杨忠芳,赵伦山,周奇明,等.胶东牟乳金矿带浅成热液金矿成矿作用的物理化学条件制约[J].矿物学报,1994,14(3):270-278.]
[11]Zhu Rixiang,Fan Hongrui,Li Jianwei,et al.Decratonic gold deposits[J].Science in China(Earth Sciences),2015,45(8):1153-1168.[朱日祥,范宏瑞,李建威,等.克拉通破坏型金矿床[J].中国科学(地球科学),2015,45(8):1153-1168.]
[12]Li L,Santoshb M,Li S R.The Jiaodong type gold deposits:Characteristics,origin and prospecting[J].Ore Geology Reviews,2015,65:589-611.
[13]Song Mingchun.The main achievements and key theory and methods of deep-seated prospecting in the Jiaodong gold concentration area,Shandong Province[J].Geological Bulletin of China,2015,34(9):1758-1771.[宋明春.胶东金矿深部找矿主要成果和关键理论技术进展[J].地质通报,2015,34(9):1758-1771.]